perfectorange.rb

class OrangeTree
  def initialize
    @height = 0
    @age = 0
    @oranges = 0
    @alive = true
  end

  def one_year_passes
    @alive = false if @height > 10 && rand(2) == 1
    return puts 'A dead tree cannot grow! :(' unless @alive

    @age += 1
    @height += rand(2) + 0.5
    @oranges = 3 * @age if can_produce_oranges?

    print 'Your Tree survived for another year! '
    print "It's now #{@age} years old and #{@height}m high. \n"
  end

  def pick_an_orange
    return puts 'You cannot pick oranges from a dead tree!' unless @alive
    return puts 'There are no oranges to pick!' if @oranges.zero?

    @oranges -= 1
    puts 'You pick a delicious orange and put it in your mouth. Yummy!'
  end

  def count_the_oranges
    return puts 'You cannot count oranges, the tree is dead!' unless @alive
    puts "I'm counting and there are #{@oranges} oranges on the tree!"
  end

  private

  def can_produce_oranges?
    @age >= 3
  end
end

# -------------------------------------------------

mytree = OrangeTree.new

20.times do
  mytree.one_year_passes
  mytree.count_the_oranges
  mytree.pick_an_orange
end